I have a NCM Aspen and I've noticed that the same problem arises typically after I have ridden it for a little while, turned it off for an hour or so, and then have ridden it again.  The odometer and speedometer quit working and then the display cuts off say every 5 minutes.  Its really annoying.  I have tried contacting leoncycle but I'm still waiting on a call.  Please offer your opinions on what this could be.  My guess is the controller.  Anyone else encountered this?